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Elden [556K]
3 years ago
14

Two ways in xylem is modified to carry out its function

Biology
1 answer:
Bess [88]3 years ago
3 0
1. The cell wall has lignin (hard substance): to prevent the xylem vessel from collapsing and withstand high pressure.
2. The absence of protoplasm (nucleus + cytoplasm) and cross wall: to allow water to move through the lumen easily.

Hope it helped!
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Please help ASAP for 10pts
masya89 [10]
1. Natural selection is the best of the organisms to live past hardships and survive, leaving the weakest to die. Survival of the fittest.

2. Adaptation is an organism changing to better themselves in a certain environment.

3. These moths were adapted to blend into their surroundings, so as to not be seen by predators.

4. Because of the pollution from the city, the tree’s bark turned from a lighter shade brown to a darker shade brown.

5. A majority of the moths were a lighter gray. With the changing color bark they were seen more by predators.

6. Adaption caused the first darker moths to appear because they learned they needed to blend into the new tree bark color.

7. The change from light to dark gray was very needed for moths. It explains natural selection for those moths who did not adapt to different color gray. Adapting the new tree bark color helped moths been less seen by predators therefor keeping their species more alive.
7 0
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Did you diagram all the faults and folds correctly? Which fault and/or fold did you find most difficult to diagram? Explain why.
Vikentia [17]

Answer:

nqjt qan

Explanation:

jbqan fm jbqfmn

7 0
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What type of molecule can easily diffuse through the plasma membrane without any help? Why?
babunello [35]
Water diffusion is called osmosis. Oxygen is a small molecule and it's nonpolar, so it easily passes through a cell membrane. Carbon dioxide, the byproduct of cell respiration, is small enough to readily diffuse out of a cell. Small uncharged lipid molecules can pass through the lipid innards of the membrane.
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3 years ago
How are simple carbohydrates able to form larger macromolecules
madreJ [45]

Answer:

Carbohydrates can be described as biological molecules which are made up of carbon, hydrogen and oxygen.

Simple carbohydrates are known as monosaccharides. Example of monosaccharide includes glucose and fructose. Two molecules of monosaccharides can join to form disaccharides. Example of disaccharide includes maltose. When three or more monosaccharides join they form polymers known as polysaccharides. In this way, simple carbohydrates form larger molecules or polysaccharides. Examples of polysaccharides include starch, glycogen, cellulose etc.

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Which of the following can wear away the solid rock of a cliff over time? A. Ocean waves but not a small stream B. A small strea
ddd [48]

Answer:

it is B

Explanation:

5 0
2 years ago
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